G train riders in Clinton Hill, Bed-Stuy and Fort Greene will be served by shuttle buses as the partial shutdown for the route enters phase three Monday.

As train service halts between Bedford-Nostrand Avs and Church Av until Sept. 3, it will resume between Court Square and Bedford-Nostrand Avs.

Underground workers are replacing track, interlockings and signals along the G train line from the time when Franklin Roosevelt was president.

Riders had expressed concern before partial shutdown that it would be a nightmare.

“Now in the hot summer I’ll have to wait for a bus that they say is going to come frequently, but I think we all know with the MTA that’s not really to be expected,” G train rider Kylie Sowder said at a town hall held on the issue back in May.

But the reality of the shuttle buses reportedly went over better than some expected.

“People told me they are loving it. They actually said I’ve never had an MTA outage or a shift of this kind that was so well executed. One woman with an English accent told me this would never happen in England,” MTA Chair and CEO Janno Lieber said at the last board meeting.

The shuttle service did appear to come as promised, one to four minutes apart on weekdays.

“It is frequent, but it’s always busy, always jam-packed,” rider Nicholas Catania said.

“I think just being on the street versus being underground is slower. But nothing to fault this specific shuttle,” rider Pricilla Frank said.

The only complaint people have really expressed is the traffic. The MTA said it would work with the Department of Transportation to mitigate.

“This strip, I think they have a lot of like produce or cargo. There are a lot of double-parked large vans that could be an issue,” rider John Tan said while on route.

The G train carries about 160,000 riders a day. Sporadic night and weekend closures will follow through 2027.